Control: retitle -1 please stop using zerofree Control: severity -1 important
Please do not add dependency on zerofree. Instead, pleas DROP zerofree usage entirely in todays world. It gave me multiple headaches already. First I tried to experiment with autopkgtest (which uses vmdb2) on a tmpfs. It all went fine until vmdb2 decided to helpfully zerofree the image, - which expanded it to whole RAM and immediately caused an OOM. I had to clean up from this for quite some time. Another case is an SSD which gets filled with zeros, having to allocate else unused blocks in the image file. And yet another - on a regular rotating HDD, it has to turn a sparse file into complete file, - in a typical autopkgtest-build-qemu use case this means writing 25Gb of data, it is insanely slow. If anything, one can use fstrim to achieve the desired result. Thanks! /mjt
